Hoisting hook



- 1,557,802 J. CLARK HOISTING HOOK Filed May 28, 1925 2 Shets-Sheet 1 o0 0 0 0 O O "3 w Oct. 20, 1925 Patented Oct. 20, 1925.

' .ron1v CLARK, or BUFFALO, NEW YORK.

HOISTING HOOK.

-- Application filed may 28, 1925. Serial 1%} 33,492..

To all whom it may concemip Beit known that I, JoH CLARK, a citizen ofthe United States, residing at Buf falo, in the county of Erie and Stateof Newv York, have invented new and useful Improvements in HoistingHooks, of which the following is a specification.

, This invention relates to a. hoisting hook which is more particularlydesigned for use in connection with hoisting tackle and ma chinery whichlifts heavy loads from one place to another, suchfor example as It istheobject of this invention to'pro vide hoisting. hook for this purposewhich is not only stronger and more durable than those heretofore;knownjbut is also not liable to foul against adjacent ob structions andis also incapableof becoming detached from the'load and thereby enablefreight to be handled withmaximum safety to; the operatives and alsowithout any de-' lay due to possible interferences. v

In the accompanying drawingsz Figure 1 is a side elevation ofahoistinghook which, embodies a satisfactory form of my invention j J z I 1 jFigure 2, is a front elevation of the same. Figure 8,v is a. verticallongitudinal section of the same. I

Figurel, isa horizontal section taken on line 4-4, Fig. 1.- v f Similarcharacters of reference indicate like parts throughout the severalviews.

The main part or body of this hoisting hook comprises an upright shank10 and a forwardly and upwardly turned beak 11 at the lower end of this,shank forming an upwardly opening month between this shank and beakwhich is adapted to receive the ring, rope or other means whereby theload to be lifted is attached to the hoisting hook. At its upper end theshank is' provided with means whereby the same is connected to thehoisting mechanism. In the present instance this i accomplishedbi m ansf an eye 12 which overhang forwardly from the upper end of. the shankand receives the lowermost link .13 of ahoisting chain formingpart ofthehoisting tackle ormechanisnn'such as that now in .eommon use for thispurpose. I y angingthe attaching eye 12 for v Wardly the center of'gravity of the'hoist ingihook is broughtnearly in line with th'e monthof. the hoisting hookso that the Weight of the load suspended by the hoing hook will be forced to hang.- to a greater extent from the: shanklOand thereby re lieve the beak 11 to. acorrespondingi extent from thisload so asto reduce thelliability of breaking the latter to a minimum. ve For the purpose of still further increas ing the strength of the;beak, also to prev vent accidental disengagement of .therload from themouthlof the hoisting hook and also to prevent the hoisting hook fromfouling or; becoming :caught. against ob structions, the following.means are: pro; vided:. 3 j if Movable intoandtout ofa. positionacrossthe-mouth of the hoisting hook in a keeper or; latch .14: which is.,preferably perm a-. nently I connected with the upper part I of theshank while its lower endis detachably connected with the .beak: of .thehoisting hook so as to permit of opening and closing the mouth] of thesame.

At itsxlowergend h1s keeper or latch is provided with an inwardlyprojecting hook 15 which in its operative position projects inpart ofthebeak 1 H a ,At its'upper endthe, latch or keeper is connected bymeans of a swivel joint with wardly through an opening 16 in the upperthe upper part of the beaklO below the eye 12thereof so asto permitthekeeper to not only swing in avertical plane parallel with the planeof the shank 10 and beak ll for the purpose of engaging. and disengagingthehook 15 of the keeper with theo ening 16 of the beaklbut to permitthe ee'perto swing Vertically in a plane at right angles to the planeofthe shank, and beak for the purpose of permitting the keeper tocompletely uncover-the mouth of. the hoist-1 ing hook and permit a ring,rope or other means of attachment on the load to be freely inserted intothe mout-hof the'hoisting' hook and alsorremoved therefrom... The

preferred form of this swivellingconnection with an upwardly projectingfoot 17, the inner side of which is adapted to bear against the opposingupper part of the inner side of the shanklO. The upper part of the in-.

ner side of this foot isrounded, as shown at 18 and-adapted to engagewith the adj acent rounded surface 19 on the upper part of theinner sideof the shank 10 and thereby.

permit the keeper to be locked or turned in avertica'l plane parallelwith the beak 11 and shank 10 .for the purpose of engaging anddisengagingv the hook 15 of the keeper with the opening 16 The foot ofthe keeper ,is provioled with a vertical slot 20 which receivesthe'central part of a. clamping or tightening bolt 21 which latter isconnected at its inner end with the'adja'cent upper part of-the shank 10by means of a screw joint 22,

as shown in Figs. and 4; The outer end of the bolt .21 provided With. ascrew thread 23, preferably of the acme type which receives a clampingscrew nut 24 adapted to engage with the outer side of the foot 17 of thekeeper and press the same against the shank'IO for the purpose-ofholding the keeper across the mouth of the hoisting hook and in aninterlocked position with the beak i 'of thesame. In order to permit thekeeper to rock freely in a vertical plane" parallel with the shank10'andbeak 11 upon loosening the clamping bolt24 only to a moderateextent the co-operating surfaces of the :7 clamping nut 24 and-thecoupling'foot 17 of the keeper are co'nstructed'so that a sphericaljoint or ball joint is formed between the same, this being accomplishedby making the inner side 25 of the nut of convex spherical form and theouter side of the foot 17 of concave spherical form, as shown in Figs. 3and 4:. i

' Complete detachment of the clamping nut 24 from the clamping and pivotbolt 21 is 'prevented. by means of astop device which preferablyconsists of a stop disk 27-arranged on the outer end of the clampingbolt 21 and over-hanging the sides "ofthe same and detachably connectedwith this bolt by means of a screw 28 or other suitable means. In ordert'o'avoid making the clamping bolt 21 unduly long and still per mit the.clamping'nut 24 to be unscrewed as far as necessary to completelyrelease the keeper a recess 29 is formed on the outer side of this nutwhich receives the stop disk 27in the outermost position of this nut, asshown by dotted lines in Fig. 3.

. Turning of the clamping nut 24 may be effected in any sultable mannerfor instance by nurling the periphery thereof ,-as shown at'SOin Fig. 1and also by inserting a wrench pin into one oranother of a plurality ofwrench openingsSl formed in different parts of the periphery of thisscrew nut, as shown in Figs. 1, 3 ands.

When this hoisting hook is in use and the keeper is locked in a positionacross the mouth of the same the hook 15 of the keeper engages-with theopening 16 of the beak 11, the foot 17 of the keeper engages the lowerend ofits slot 20 with the clamping bolt 21 and the screw nut 24 pressesthis foot againstthe upper part of the shank 10, as shown by full linesin Figs. '1 and V 3. For the purpose of opening the mouth of the hook inorder to permit the load to\ be detached from the month thereofandanother load substituted, the screw ,nut, 24 is first loosened byunscrewing the same suf ficiently for 'thispurpose after which thekeeper may be turned in a vertical plane" parallel with the plane of theshankglO and beak 11. At which time the foot 17 at the upper end. of thekeeper will slide downwardly between the nut and shank 10 1 until theupper part of the slot 20 of the foot engages with the top of theclamping bolt 21, thereby releasing the hook 15 of .the keeper from thebeak 11, as shown by dotted lines in Fig. 3. The keeper may now be swungin a vertical plane at right angles to'the 'plane'of the shank and beakof the hoisting hook" 'for' the purpose of completely' uncovering themouth of the hoisting hook, this extreme opening position of the keeperbeing representedby dotted lines in Fig. '1. I

Upon reversing the'operation ofthe parts as just described the keeperWill be again returned to its working position for closing the mouth-ofthe hoisting hook and confining the load therein; 1

In order to produce a postive" upward pull of the shank on the keeper inaddition to' the frictional pullagainst the same by means of theclamping bolt and nut an upwardly facing shoulder 3-2 is formed on thecentral part of the inner side of the shank 10 which shoulder engageswith the adjacent upper part of the surface of the keeper, as shown inFigs. 1 and 3. By this means the upper part of the beak 11 is positivelyand reliably connected with the upper part of the shank so that the beakis strengthened and re-inforced against breakage'under the load and thehoisting hook as a whole is substantially as strong as a completelyclosed link. i

The inner part of the attaching eye 12' of the shank overhangs to aconsiderable the hoisting hook, thereby avoiding possible injury to theoperatives who are d0- ing the work.

All of the several parts of this hoisting hook and the means for closingthe mouth of the same are permanently connected with each other so thatthey practically form a complete unit, the several parts of which cannot become loose, thereby expediting the work of transferring materialby means of this hook and reducing the cost accordingly.

Inasmuch as this hoisting hook is comparatively simple in constructionand its several parts are strong and durable and not liable to give wayunder any load likely to be imposed upon the same, this increases thesafety of the operatives in the work of handling freight. Moreover thishoisting hook is capable of use in connection with hoisting apparatus ofthe usual construction now in general use so that no change need be madetherein for receiving the hoisting hook made in accordance with thisinvention.

If the stud bolt 21 should become broken the same can be easily replacedby a new one. In order to compensate for the removal of metal in formingthe opening in the shank which receives the stud bolt 21 the adjacentsides of the shank are thickened, as shown at 100, thereby strengtheningthe shank and enabling the same to sustain the maximum load which islikely to be carried by the hoisting hook.

Instead of making the bolt 21 in the form of a stud bolt, as shown inthe drawings, this bolt may be made in one piece with the shank.

I claim as my invention 1. A hoisting hook comprising a shank and abeak, and a keeper movable into and out of a position across the mouthof said hook and having one end pivotally connected with said shank soas to be capable of turning in a plane at right angles thereto andadapted to be detachably connected at its opposite end with said beakand said shank being provided on its front side with a shoulder adaptedto engage with the underside of said keeper.

2. A hoisting hook having a shank and a beak provided with an opening, aclamping bolt arranged on the front side of said shank, and a keepermovable into and out of a position across the mouth of said hook andcapable of turning on said bolt parallel with the plane of said shankand beak and also sliding lengthwise thereof and provided with a hookadapted to engage with the opening of said beak.

3. A hoisting hook comprising a shank and a beak having an opening, aclamping bolt having a body projecting forwardly from the shank, and akeeper movable into and out of a position across the mouth of said hookand provided at one end with a longitudinal slot which receives saidbolt body and a hook at its opposite end which is adapted to engage theopening of said beak.

4. A hoisting hook comprising a shank and a beak having an opening, aclamping and a beak having an opening, a clamping bolt having a bodyprojecting forwardly from the shank, a keeper'movableinto and out of apomtion across the'mouth of said hook and provided at one end with alongitudinal slot which receives said bolt body and a hook at itsopposite end which is adapted to engage the opening of said beak, ascrew nut arranged on said bolt body and engaging with the front side ofsaid keeper, and means for preventing said nut from wholly unscrewingfrom said bolt body.

6. A hoisting hook comprising a shank and a beak having an opening, aclamping bolt having a body projecting forwardly from the shank, akeeper movable into and out of a position across the mouth of said hookand provided at one end with a longitudinal slot which receives saidbolt body and a hook at its opposite end which is adapted to engage theopening of said beak, a screw nut arranged on said boltbody and engagingwith the front side of said keeper,

JOHN CLARK.

